Portal de Periódicos da CAPES

Foam Performance Under Reservoir Conditions

1989; Linguagem: Inglês

10.2523/19691-ms

F. E. Suffridge, Kevin T. Raterman, G. C. Russell,

Hydraulic Fracturing and Reservoir Analysis

Emerging Geophysical Technologies: Is Planting and Re-Planting of Nodes in a 4C-4D Scenario the Optimum and Most Cost-Effective Solution for Field Reservoir Monitoring? Eivind Berg; Eivind Berg Seabed Geophysical AS Search for other works by this author on: This Site Google Scholar Claude Vuillermoz; Claude Vuillermoz CGG Integrated Studies Search for other works by this author on: This Site Google Scholar Geir Woje; Geir Woje Seabed Geophysical AS Search for other works by this author on: This Site Google Scholar Gunnar Ekmann Gunnar Ekmann Search for other works by this author on: This Site Google Scholar Paper presented at the Offshore Technology Conference, Houston, Texas, USA, May 2008. Paper Number: OTC-19691-MS https://doi.org/10.4043/19691-MS Published: May 05 2008 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Berg, Eivind, Vuillermoz, Claude, Woje, Geir, and Gunnar Ekmann. "Emerging Geophysical Technologies: Is Planting and Re-Planting of Nodes in a 4C-4D Scenario the Optimum and Most Cost-Effective Solution for Field Reservoir Monitoring?." Paper presented at the Offshore Technology Conference, Houston, Texas, USA, May 2008. doi: https://doi.org/10.4043/19691-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search nav search search input Search input auto suggest search filter All ContentAll ProceedingsOffshore Technology ConferenceOTC Offshore Technology Conference Search Advanced Search AbstractSeabed data acquisition methods offer numerous advantages over towed streamer data. These advantages can lead to improved static and dynamic reservoir characterization. By recording complete vector field data at the sea floor with full azimuth acquisition improved shallow resolution, signal-to-noise ratio, spectral content, deep imaging and 3D illumination can be achieved. Also in the presence of obstacles such as production facilities a regular coverage can be assured.Autonomous node technology has been developed to a fully commercial system. It has demonstrated improved imaging of complex reservoir with both pressure (PP) and converted shear (PS) with stable and consistent measurements achieved by very well planted nodes into the sea floor and full azimuth acquisition with densely sampled shots.It has been experienced that the background response from well planted nodes can be repeated in a 4C-4D scenario when the coupling conditions are the same. The vector fidelity in the node system will secure this behavior. In addition, the accurate positioning and re-positioning of the nodes under realistic water depth ranges gives positioning accuracy close to permanently buried cable systems. An experiment performed on the Volve field in the North Sea with pairs of nodes planted side by side clearly confirmed the high degree of stability in the coupling and the repeatability of the measurements from all components. At 100 m water depth all the planted nodes were within a short radius around the pre-plot position.A cost sensitivity study of different 4C-4D node scenarios depending of field size, water depths and node spacing indicates that, for larger field sizes (300-600km2 receiver coverage), the alternative use of nodes could be significantly more cost effective than permanently buried cable systems. Moreover, there are advantages linked to the acquisition geometry, operation, zero equipment life time risk and low initial investment.IntroductionMarine seismic exploration and reservoir imaging have been through numerous stages of adjustments and improvements. Towed streamer surveys from 2D to 3D and now to 4D dominate the offshore seismic survey with a well established technology which remains the most common acquisition with narrow azimuth coverage. New techniques such as " single sensor recording?? (Egan et al, 2005), " over-under?? (Singh et al, 1996) and " wide azimuth?? (Campbell et al, 2002) have recently delivered impressive results. These techniques have raised the cost and complexity to more traditionally " simple?? towed streamer operations. Keywords: reservoir characterization, imaging, offshore technology conference, repeatability, cost sensitivity study, node scenario, azimuth, water depth, repeat survey, scenario Subjects: Reservoir Characterization, Seismic processing and interpretation This content is only available via PDF. 2008. Offshore Technology Conference You can access this article if you purchase or spend a download.